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Given:

CaC2 + N2 → CaCN2 + C

In this chemical reaction, how many grams of N2 must be consumed to produce 265 grams of CaCN2? Express your answer to three significant figures.

The reaction requires how many grams of N2?

Respuesta :

superman1987

Answer:

92.6 g.

Explanation:

  • The balanced equation is:

CaC₂ + N₂ → CaCN₂ + C.

  • It is clear that 1.0 mole of CaCâ‚‚ reacts with 1.0 mole of Nâ‚‚ to produce 1.0 mole of CaCNâ‚‚ and 1.0 mole of C.
  • We need to calculate the no. of moles of 265.0 g of CaCNâ‚‚ produced using the relation:

n = mass / molar mass = (265.0 g) / (80.102 g/mol) = 3.308 mol.

  • We should get the no. of moles of Nâ‚‚ needed to produce 3.308 mol of CaCNâ‚‚.

∵ 1.0 mole of N₂ produces → 1.0 mole of CaCN₂.

∴ 3.308 mole of N₂ produces → 3.308 mole of CaCN₂.

  • Now, we can get the grams of Nâ‚‚  consumed to produce 265.0 g of CaCNâ‚‚:

∴ The grams of N₂ = n x molar mass = (3.308 mole)(28.0 g/mol) = 92.63 g = 92.6 g.

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